Copolyester amides, and method for making

US5091494A · kind A · utility

Assignee

• Akademie der Wissenchaften der DDR · DE

Inventors

• Dirk Leistner · Dresden, DE
• Frank Bohme · Dresden, DE
• Doris Pospiech · Dresden, DE
• Manfred Ratzsch · Dresden, DE
• Christian Vieth · Geesthacht, DE
• Michael Stephan · Dresden, DE

Key dates

• Filing date: Jul 30, 1990
• Grant date: Feb 25, 1992
• Expiry date: Jul 30, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to new aromatic/aliphatic and/or alicyclic copolyester amides with high molecular weights, without crosslinking. A subsequent solid phase condensation is avoided or is greatly limited in time. The occurrence of thermal decomposition reactions, dark discolorations of the polymers as well as the formation of block structures are avoided.